Sometimes problems arise because the romance has drained out of the marriage a bit. We're more forgiving early in the relationship when we're still fresh and new to each other, and more critical of each other in the later years.
Many problems can be solved by simply heading out in town, going dancing, and courting each other a bit again. A little romancing goes a long way. If we've gotten out of the habit and it feels silly or awkward to act like love-struck kids again, then we make a game of it. But one way or the other, it's always good to make that effort and get back in the habit of really liking each other's company.